A stability alarm system for small four-wheel tractors

A stability alarm system, to sense the stability of a tractor and to warn the operator before instability is reached, was developed The developed transducer can sense the change of ground normal load under the tractor wheel The alarm will give a warning at a certain level of ground slope, which can be set by varying a reference voltage. The output curve of the stability transducer follows a sine or cosine curve depending upon the heading and tilting angle of the tractor and agrees with the change of ground normal load on the wheel as measured on a weigh-pad This agreement proved that the developed stability transducer can he used as a sensor to sense the existence of ground normal load on the wheel, which sensed the tractor stability.